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2007 Confidence Interval Detail
226/Tom Green
226-906/Wall ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 21,353,328 0.7083 30,147,294 8 347 .077914303
A 21,281,346 0.9291 22,905,334 8 207 .006096281
A 21,305,047 0.9497 22,433,450 10 140 .008991387
A 21,205,846 1.0518 20,161,481 7 76 .003284870
D3 27,626,630 1.0608 26,043,203 9 2,436 .030941930
Random Totals: 112,772,197   121,690,762 42 3,206  
Catg D1 Exception Values: 30,342,890   30,544,315      
Total Test Values (4): 143,115,087   152,235,077      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 7,611,754

Confidence Interval Values (5)

Local Test Value: 143,115,087 (Outside Confidence Interval)
State Lower Limit: 144,623,323 (State Test Value minus Margin of Error Percent)
State Upper Limit: 159,846,831 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 174,037,527 (See ISD Summary Worksheet)

Sources:
(1) See Stratified Category Worksheet Reports PTS236, PTS430
(2) Number of parcels sampled by staff
(3) Total Category Parcels from Stratification Report, Appraisal Roll, or Self-report
(4) Includes any parcels in A, B, C, D3, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values
(6) Includes local value of unstudied property categories and sub-categories

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